Francis is speaking well beyond the limits of his expertise.
Speaking not merely outside his expertise (I think his expertise is in Spanish poetry or something like that), but outside his authority as a bishop and Pope.
It is objectionable that he is promoting the Global Warming Hoax, which is part of a vast scheme to further impoverish and murder hundreds of millions of “the poor” that the Pope professes to care about.
Worst Pope in several centuries.